CN104426257A - Distributed cascaded winding for electric machines - Google Patents
Distributed cascaded winding for electric machines Download PDFInfo
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- CN104426257A CN104426257A CN201410605755.4A CN201410605755A CN104426257A CN 104426257 A CN104426257 A CN 104426257A CN 201410605755 A CN201410605755 A CN 201410605755A CN 104426257 A CN104426257 A CN 104426257A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Abstract
A stator includes a cylindrical core (10) with a plurality of longitudinally extending slots (12), a first winding set formed as a first cascaded wire (35) in two radial layers of the slots, a second winding set formed as a second cascaded wire (36) in two other radial layers of the slots, and a jumper connecting the first and second wires. A first winding set may have three cascaded phase wires in first and second layers of the slots, and a second winding set may have three cascaded phase wires (36) in third and fourth layers of the slots. A winding set of a first phase (A) may have a first cascaded wire (35, 36) in two radial layers of a first one (59) of the slots, and a winding set of a second phase (B) may have a second cascaded wire (46, 47) in two other radial layers of the first one of the slots.
Description
Related application
This application claims the priority of the U.S. Patent Application Serial Number 13/974,591 submitted on August 23rd, 2013.
Background technology
Typical execution mode relates to the cost reduction of motor stator winding and manufactures simplification, and more particularly, relates to and realize high machine efficiency and high manufacture efficiency by the level tie of stator winding.
Motor in automobile application comprises alternating current generator, alternator-starter, traction motor and other motor.Typical motor stator comprises cylindrical core, and it is formed by the heap of independent lamination and has the multiple circumferentially spaced grooves axially across stator core.Rotor assembly comprises central shaft and coaxial with stator core.Stator core has and is wound around line conductor thereon with winding configuration, its several axially across in core slots.End winding is formed in winding at two axle heads of stator core, and given winding circumferentially has end loops to during another groove at it.By this general mode, according to selected winding diagram, axially extend to the other end from one end in several grooves of stator winding in selected multiple stator coring grooves and between the slots circumferentially.
Stator can be formed by the independent phase winding of such as three-phase, five phases, six equal any amount, and thus determines the overall winding diagram implemented when coiling stator core.Improving because overwhelming majority's application all focuses on the cost reducing motor while efficiency, therefore expecting farthest to fill the mode of stator coring groove to utilize available groove.The stator that copper factor is high produces more electric power with higher machine efficiency usually.Use rectangular conductor line can realize the copper factor of 75% or higher.Hairpin conductor is the U-shaped solid wire that cross sectional shape is roughly rectangle, and as the part of phase winding, it inserts in two grooves and in another axle head distortion of stator core at an axle head of stator core and is also soldered to other hairpin conductor subsequently.But, use hairpin conductor may need reach reach between high copper factor and the less desirable interchange performance characteristics reducing such as kelvin effect etc. compromise.Along with the increase of conductor thickness, kelvin effect decreases the effective cross-sectional area of conductor in groove.Therefore, generally speaking, in groove, the thickness of rectangular lines conductor should be made into little as much as possible.Or, such as, by placing more than one phase in a groove, given wiring configuration can be designed and reduce less desirable performance to a great extent.
Manufacturing issue and the increase of relevant cost also may be run into when being formed and weld hairpin conductor.Such as, a large amount of welding is typically needed in the end of an axle head connection hairpin conductor of stator.In addition, need each hairpin conductor intersect relative to adjacent hairpin end conductor or be crisscross arranged, and insert, bending and arrange each hairpin conductor and need a large amount of manufacturing steps.
Summary of the invention
Therefore expect by providing a kind of stator winding configuration that can adopt in mode that is simple, distribution to eliminate above-mentioned unfavorable conditions.Disclosed exemplary embodiment utilizes the continuous lines conductor of cascade to form two or more distributed portions, and each several part combines by the minimum interconnection of such as welding thus.
According to typical execution mode, stator comprises the iron core of the substantial cylindrical of the groove of multiple longitudinal extensions having two axle heads and formed between, be formed as the first winding combination of the first cascade conductor of two radial layer being arranged in groove, be formed as the second winding combination of the second cascade conductor of two other radial layer being arranged in groove, and connect the wire jumper of the first and second conductors.
According to another exemplary embodiment, stator comprises the iron core of the substantial cylindrical of the groove of multiple longitudinal extensions having two axle heads and formed between, be formed as the first winding combination of three the cascade phase conductors of first and second layers being arranged in groove, and be formed as the second winding combination of three the cascade phase conductors of third and fourth layer being arranged in groove.
According to another exemplary embodiment, stator comprises the iron core of the substantial cylindrical of the groove of multiple longitudinal extensions having two axle heads and formed between, be formed as the first winding combination of the first-phase of the first cascade conductor of two radial layer of the first groove being arranged in groove, and be formed as second winding combination of second-phase of the second cascade conductor of two other radial layer of the first groove being arranged in groove.
Above-mentioned summary does not limit the invention, and the present invention is limited by the claim of adding.Similar, title and summary are also not used in and carry out any restriction to required scope of invention.
Accompanying drawing explanation
The following description of reference implementation mode by reference to the accompanying drawings, the above-mentioned aspect of exemplary embodiment will become to be understood and is easier to understand more, wherein:
Fig. 1 is the perspective view of typical stator core;
Fig. 2 shows the exemplary distribution formula winding method of the stator core for having four radial groove layer;
Fig. 3 shows another exemplary distribution formula winding method of the stator core for having four radial groove layer;
Fig. 4 show according to exemplary embodiment, insert before the winding diagram of distributed cascade stator winding and the groove filling mode of a phase;
The slot that Fig. 5 shows a phase of typical stator winding is put;
Fig. 6 is according to exemplary embodiment, the top plan view of (fully populated) stator core of filling completely;
Fig. 7 is according to exemplary embodiment, the top plan view that single-phase cascade winding is shown; And
Fig. 8 shows the typical magnetic circuit of the partial top plan view of Fig. 2 stator winding.
In multiple view, corresponding Reference numeral represents corresponding or similar parts.
Embodiment
Execution mode described below is not exhaustive or limits the invention to disclosed precise forms.On the contrary, execution mode is selected and is described as making others skilled in the art can be appreciated and understood that these principles of instructing and hands-on approach.
Fig. 1 is the perspective view of substantial cylindrical stator core 10.Stator core 10 comprises multiple core slots 12 of radially outward stretching out from its circumferential inner surface 14.Core slots 12 extends on the direction of arrow 16 indication relative to the central shaft 17 of stator core 10 between the top 18 of its first axle head 18 or stator core 10 and the bottom 20 of its second axle head 20 or stator core 10.Axial direction is upwards restricted to moves towards stator core first axle head 18 or top 18, and axially downward direction is restricted to and moves towards stator core second axle head 20 or bottom 20.The general circumferentially inner surface 14 of core slots 12 is uniformly distributed, and in general inner surface 14 part between core slots 12 is basically parallel to central shaft 17.Circumference clockwise direction is illustrated by arrow 21, and circumference is counterclockwise illustrated by arrow 23.Core slots 12 limits the degree of depth 25 of the radial axle along arrow 24 indication, and is suitable for receiving stator winding, and it has more detailed description hereinafter.The central shaft 17 that radially inner direction is restricted to towards stator core 10 moves, and radially outer direction is restricted to central shaft 17 dorsad and moves.
In each figure, the numeral of the groove of numeric representation and the described of layer is comprised by additional according to its text description respective hereinafter.Fig. 2 shows the exemplary distribution formula winding configuration of the stator core for having four radial groove layer.The pair of conductors 1 of A phase, 13 grooves (13) of 2 six grooves (6) being placed in one deck (1), seven grooves (7) and two layers (2) and 14 grooves (14), thus span the pitch of seven grooves.The pair of conductors 3 of B phase, 4 are arranged in seven grooves (7) of two layers (2) and eight grooves (8) and in 12 grooves (12) of one deck (1) and 13 grooves (13), thus span the pitch of five grooves.Three layers (3) and four layers (4) repeat this mode of A phase and B phase: the pair of conductors 5 of A phase, in 6 six grooves (6) being arranged on three layers (3), seven grooves (7) and in 13 grooves (13) of four layers (4) and 14 grooves (14), thus span the pitch of seven grooves; The pair of conductors 7 of B phase, 8 are arranged in seven grooves (7) of four layers (4) and eight grooves (8) and in 12 grooves (12) of three layers (3) and 13 grooves (13), thus span the pitch of five grooves.Because this first exemplary distribution formula winding diagram can have different pitches for independent phase winding, therefore it is referred to as asymmetrical or uneven at this.
Fig. 3 shows another exemplary distribution formula winding configuration of the stator core for having four radial groove layer.The pair of conductors 26 of A phase, 27 are arranged on 12 grooves (12) in six grooves (6) in one deck (1) and seven grooves (7) and two layers (2) and 13 grooves (13), thus span the pitch of six grooves.The pair of conductors 28 of B phase, 29 are arranged on 12 grooves (12) in six grooves (6) in two layers (2) and seven grooves (7) and one deck (1) and 13 grooves (13), thus span the pitch of six grooves.Three layers (3) and four layers (4) repeat this mode of A phase and B phase: the pair of conductors 30 of A phase, 31 are arranged on 13 grooves (13) in seven grooves (7) in three layers (3) and eight grooves (8) and four layers (4) and 14 grooves (14), thus span the pitch of six grooves; The pair of conductors 32 of B phase, 33 are arranged on 13 grooves (13) in seven grooves (7) in four layers (4) and eight grooves (8) and three layers (3) and 14 grooves (14), thus span the pitch of six grooves.Because this second exemplary distribution formula winding diagram can have substantially identical pitch for independent phase winding, therefore it is referred to as symmetry or uniform at this.
Typical stator winding form shown in Fig. 2 and 3 also can be placed by using independent terminal box (wiringmagazines), thus affects distributed winding.Such as, can the winding of one deck (1) and two layers (2) be placed in stator core in a winding operation, can place the winding of three layers (3) and four layers (4) in an independent winding operation subsequently.But these forms all need to make conductor interlock when order places conductor pair at assembly process.This staggered winding generally adopts the hair-pin conductor section connected at an axle head of stator core 10 to realize.Hair clip manufacture process comprises each conductor leg is soldered to adjacent conductor leg, and a large amount of independent welding increases the probability the reliability and the consistency that reduce winding that produce defect.The form that the use of hairpin conductor segment also needs to intersect or interlock usually is bending and arrange hair clip supporting leg, and this will be increased to the axial length of stator module and this will cause occurring the additional possibility of short circuit or other products defect.
According to exemplary embodiment, Fig. 4 shows the winding diagram for ease of the distributed cascade stator winding 34 arranged in a linear fashion for the purpose of observation, and show the groove padding scheme of A phase on upper left side, the groove of its reference number one (1), two (2) and three (3).Fig. 5 is the winding diagram of Fig. 4 exemplary distribution formula cascade stator winding, and its difference is to illustrate only a phase (A phase), and the groove number of each layer wherein shared by A phase conductor is through unshakable in one's determination.Shown scheme is designed to the stator core with 48 circumferential grooves, but also can use the groove of other multiple of six any.The pair of conductors 35 of A phase, in 36 grooves (1) being arranged on one deck (1) respectively and two grooves (2), and conductor 35,36 seven grooves (7) and eight grooves (8) extending to one deck (1) respectively, thus each conductor 35,36 crosses over the pitch of six grooves.Except as otherwise noted, A phase conductor is to 35, and the follow-up circumferential section of the level tie of 36 extends with the pitch of six grooves.Especially, when A phase conductor 35,36 is when stator core 10 liang is all, the wiring part 37 of 5-7 pitch occurs twice.Such as, by being sequentially placed in 37 grooves (37) and 44 grooves (44), conductor 35 has the pitch of seven grooves in one deck (1), by being sequentially placed in 38 grooves (38) and 43 grooves (43), conductor 36 has the pitch of five grooves in one deck (1).Conductor 35,36 in one deck (1) through the wiring part 37 of 5-7 pitch, and be configured to the wiring part 38 of 7 pitches of the transition portion be positioned between one deck (1) and three layers (3) subsequently.Similar, conductor 35,36 in four layers (4) through the wiring part 37 of 5-7 pitch, and be configured to the wiring part 38 of 7 pitches of the transition portion be positioned between four layers (4) and two layers (2) subsequently.The wiring part 37 of 5-7 pitch and the wiring part 38 of 7 pitches altogether for have for hexad conductor conductor 35 as the layer of outer conductor and have conductor 36 as outer conductor lower one deck between transition.Reverse part 45 is for changing the circumferencial direction of cascade winding between three layers (3) and four layers (4).Reverse part 45 can be made of one continuous print line conductor, or it can be such as right by the line conductor welded or any suitable integrating step a combines part.
See Fig. 4, Reference numeral 39-44 relates to the conductor part of the conductor 35,36 shown in cutaway view; Such as, conductor 35 and conductor part 43 are the part of same conductor 35.The conductor part 39 being arranged in two layer of (2) groove (1) place can be the extension of conductor 36.The conductor part 40 being arranged in two layer of (2) two grooves (2) place can be the extension of conductor 35.The conductor part 41 being arranged in three layer of (2) two grooves (2) place can be the extension of conductor 36.The conductor part 42 being arranged in four layer of (4) two grooves (2) place can be the extension of conductor 35.The conductor part 43 being arranged in three layer of (3) three grooves (3) place can be the extension of conductor 35.The conductor part 44 being arranged in four layer of (4) three grooves (3) place can be the extension of conductor 36.The program repeats around the groove 12 of stator core 10, A phase is filled with all layers in two grooves (2) thus, be filled with left side adjacent slot (namely, one groove (1)) lateral half in radial direction divides or rear section, and the inner side half part or the forward part that are filled with in adjacent slot (that is, three grooves (the 3)) radial direction of right side.In general, the feature of distributed winding be each phase " full; " groove (namely, be filled with the groove 12 of the conductor of a phase) in there is " X " individual radial slot/section, there is X/2 slot/section in the radial outside or rear section of left side adjacent slot, and in the radially inner side or front part of right side adjacent slot, there is X/2 slot/section.
As mentioned above, conductor 35 and 36 is for A phase.See Fig. 4, conductor 46 and 47 is for B phase, and conductor 48 and 49 is for C phase.Each cascade in six phase conductors 35,36,46-49 of stator winding 34 connects, and this means that at least three continuous print conductor parts of a conductor are accommodated in the same layer of groove.For winding at least partially, this just allows each conductor sequence to be placed in the groove 12 of stator core 10.Therefore, conductor can not interlock.Conductor also can be formed by continuous print line conductor.Such as, conductor 35,36,46-49 can do zig zag and be positioned at one deck (1) and three layers (3) as shown to form the first distributed winding 50, and conductor 35,36,46-49 can be positioned at the top of the first distributed winding 50 to form the second distributed winding 51 in two layers (2) and four layers (4).(note: for the sake of clarity, shown second distributed winding 51 is positioned at below the first distributed winding 50.) each conductor part of winding is placed in the groove 12 of suitable stator core 10.
Reverse part 45 can be formed as first and second distributed winding 50,51 that interconnect, or can form interconnection in one or more different position.Such as by changing into clockwise circumferencial direction from counterclockwise circular direction, the circumferencial direction that winding can be made to install is reverse.Reverse part 45 changes the relative bearing of a phase conductor 35,36,46-49 by forming one or more ring, thus, such as, can change the cascade order of connection limited by above-mentioned zigzag manner between three layers (3) and four layers (4).For selected connection plan, any radiai adjustment can be implemented to conductor part easily.
According to exemplary embodiment, Fig. 6 is the top plan view of the stator core 10 of filling completely.Shown A phase conductor part uses the hash sign 52 of light color, and shown B phase conductor part uses moderate hash sign 53, and shown C phase conductor part uses dark hash sign 54.The conductor part 40-42 of A phase, four layers of 56 filling slots 57.The conductor part 39,55 of A phase fills the rear portion or radial outer two-layer of left side adjacent slot 58, and the conductor part 43,44 of A phase fills the front portion or radial inner two-layer of right side adjacent slot 59.Four layers of the conductor part 60-63 filling slot 64 of B phase.The conductor part 65,66 of B phase fills the rear portion or radial outer two-layer of left side adjacent slot 67, and the conductor part 68,69 of B phase fills the front portion or radial inner two-layer of right side adjacent slot 70.Four layers of the 71-74 filling slot 75 of the conductor part of C phase.The conductor part 76,77 of C phase fills the rear portion or radial outer two-layer of left side adjacent slot 78, and the conductor part 79,80 of C phase fills the front portion or radial inner two-layer of right side adjacent slot 81.What the distributed winding for threephase stator thus shown in Fig. 6 implemented Fig. 4 totally fills out groove scheme.Specifically, each tankful 57,64,75 has " X " individual radial slot, each conductor being all filled with a phase; Each rear portion of corresponding left side adjacent slot 58,67,78 or radial outer two-layer " X/2 " individual conductor segment with same phase; And each front portion of the right side adjacent slot 59,70,81 of correspondence or radial inner two-layer " X/2 " individual conductor segment with same phase.
According to exemplary embodiment, Fig. 7 shows the top plan view of the cascade winding of single phase (such as, A phase).First conductor of this single phase is shown as round line and has the lead-in wire 87,83 stretched out.Second conductor of same single phase is shown as to have and stretches out lead-in wire 86, the rectangular lines of 82.Although be depicted as illustrative purposes in Fig. 7 and have different cross sectional shapes, but conductor actual in most applications has identical cross sectional shape.In order to improve copper factor, the shape of conductor is generally rectangle, but also can be square, circular or other any shapes.Once coiling completes, the first and second conductors are just connected in parallel.Such as, can use the lead-in wire 82 that the lead-in wire 86,87 stretched out connects together and will stretch out with the configuration of parallel connection by wire jumper or analog, 83 connect together.In an alternate embodiments, connected together by the lead-in wire 83,87 that will stretch out and pass through the lead-in wire 82,86 stretched out to connect together and the first and second conductor series connections can be connected.For convenience of description, unique mark is not carried out to each conductor part shown in Fig. 7, but the group of relevant conductor part is identified, and each group like this represents above described in last paragraph and shown in figs. 4 and 6 groove padding scheme.The group 90-97 of three grooves is arranged along the circumference of stator core 10, and represents the part of the A phase winding of the groove 12 through stator core 10.
Can circumferential span when not having to connect between formation group 91 and 97, and the wire route between group is in succession being positioned at the first stator core axle top 18 and is being positioned at change between the second stator core axle head or bottom 20 (Fig. 1).Specifically, wiring part 98 is as one deck conductor part 88,89 and one deck conductor part 99 organizing 92 respectively in group 91, and a pair line part formed between 100 be 20 layouts bottom stator core.The wiring part 101 of next order is as one deck conductor part 99,100 and one deck conductor part 102 organizing 93 respectively in group 92, and a pair line part formed between 103 is arranged along stator core top 18.This same wire routing mode continues in the clockwise direction, thus wiring part 104 as respectively between one deck conductor part 102,103 and a pair one deck conductor part of group 94 of group 93 a pair line part being formed bottom stator core 20.Wiring part 105 as respectively between a pair one deck conductor part in one deck conductor part and group 95 of group 94 a pair line part being formed through state's stator core top 18.Wiring part 106 as respectively between a pair one deck conductor part in one deck conductor part and group 96 of group 95 a pair line part being formed bottom stator core 20.Wiring part 107 as respectively between a pair one deck conductor part in one deck conductor part and group 97 of group 96 a pair line part being formed through stator core top 18.
Top/bottom alternate scheme described in the preceding paragraph falls is put upside down and is carried out in two layers of conductor part, repeats in three layers of conductor part, and puts upside down in four layers of conductor part and carry out.Specifically, wiring part 108 is as two layers of conductor part 111 in layer conductor part of two respectively in group 91 109,110 and group 92, and a pair line part formed between 112 is arranged along stator core top 18.The wiring part 113 of next order 20 to be arranged bottom stator core as a pair line part formed between layer conductor part of two respectively in group 92 111,112 and the respective two layers of conductor part of group 93 two.This same wire routing mode continues in the clockwise direction, thus wiring part 114 as respectively between a pair two layers of conductor parts in two layers of conductor part and group 94 of group 93 a pair line part being formed through stator core top 18.Wiring part 115 as respectively between a pair two layers of conductor parts in two layers of conductor part and group 95 of group 94 a pair line part being formed bottom stator core 20.Wiring part 116 as respectively between a pair two layers of conductor parts in two layers of conductor part and group 96 of group 95 a pair line part being formed through stator core top 18.Wiring part 117 as respectively between a pair two layers of conductor parts in two layers of conductor part and group 97 of group 96 a pair line part being formed bottom stator core 20.
For three layers of conductor part, wiring part 118 is as a pair line part formed between three layers of conductor part 153,154 and a pair three layers of conductor parts of group 92 of group 91 respectively, 20 layouts bottom stator core.The wiring part 119 of next order is arranged along stator core top 18 as a pair line part formed between a pair three layers of conductor parts and a pair three layers of conductor parts of group 93 of group 92 respectively.This same wire routing mode continues in the clockwise direction, thus wiring part 120 as respectively between a pair three layers of conductor parts in a pair three layers of conductor parts and group 94 of group 93 a pair line part being formed bottom stator core 20.Wiring part 121 as respectively between a pair three layers of conductor parts in a pair three layers of conductor parts and group 95 of group 94 a pair line part being formed through stator core top 18.Wiring part 122 as respectively between a pair three layers of conductor parts in a pair three layers of conductor parts and group 96 of group 95 a pair line part being formed bottom stator core 20.Wiring part 123 as respectively between a pair three layers of conductor parts in a pair three layers of conductor parts and group 97 of group 96 a pair line part being formed through stator core top 18.
For four layers of conductor part, wiring part 124 is arranged along stator core top 18 as a pair line part formed between four layers of conductor part 143,145 and a pair four layers of conductor parts of group 92 of group 91 respectively.The wiring part 125 of next order is as a pair line part formed between a pair four layers of conductor parts and a pair four layers of conductor parts of group 93 of group 92 respectively, 20 layouts bottom stator core.This same wire routing mode continues in the clockwise direction, thus wiring part 126 as respectively between a pair four layers of conductor parts in a pair four layers of conductor parts and group 94 of group 93 a pair line part being formed through stator core top 18.Wiring part 127 as respectively between a pair four layers of conductor parts in a pair four layers of conductor parts and group 95 of group 94 a pair line part being formed bottom stator core 20.Wiring part 128 as respectively between a pair four layers of conductor parts in a pair four layers of conductor parts and group 96 of group 95 a pair line part being formed through stator core top 18.Wiring part 129 is as four layers of conductor part 147 respectively in a pair four layers of conductor parts and group 97 of group 96, and a pair line part formed between 148 is bottom stator core 20.
One deck conductor part 131,132 of wiring part 130 in group 97 of 5-7 pitch and two layers of conductor part 133 of group 90, formed between 134.As its result, between group 97 conductor part 131 and group 90 conductor parts 134, have the pitch of seven grooves, between group 97 conductor part 132 and group 90 conductor parts 133, have the pitch of five grooves.The three layer conductor part 136,138 of wiring part 135 in group 97 of 5-7 pitch and four layers of conductor part 137 of group 90, formed between 139.As its result, between group 97 conductor part 136 and group 90 conductor parts 137, have the pitch of seven grooves, between group 97 conductor part 138 and group 90 conductor parts 139, have the pitch of five grooves.One deck conductor part 84,85 of wiring part 140 in group 90 of 5-7 pitch and two layers of conductor part 109 of group 91, formed between 110.As its result, between group 90 conductor part 84 and group 91 conductor parts 110, have the pitch of seven grooves, between group 90 conductor part 85 and group 91 conductor parts 109, have the pitch of five grooves.The three layer conductor part 142,144 of wiring part 141 in group 90 of 5-7 pitch and four layers of conductor part 143 of group 91, formed between 145.As its result, between group 90 conductor part 142 and group 91 conductor parts 145, have the pitch of seven grooves, between group 90 conductor part 144 and group 91 conductor parts 143, have the pitch of five grooves.
At each four layers of conductor part 147,148 of group 97 and four layers of conductor part 139 of its corresponding group 90, between 137, be formed with reverse part 146.As its result, the clockwise wiring direction of a pair line part of wiring part 129 is at conductor part 139, and 137 places change into the counterclockwise wiring direction at wiring part 135 place in 5-7 pitch.This have impact on the wiring transition between three or four layers equally.
At two layers of conductor part 150,151 of group 97 and three layers of conductor part 142 of group 90, be formed with the wiring part 149 of 7 pitches between 144, thus have impact on the wiring transition between two or three layers.At two layers of conductor part 133,134 of group 90 and three layers of conductor part 153 of group 91, between 154, be formed with the wiring part 152 of 7 pitches, thus equally the wiring transition between two or three layers impacted.
Fig. 8 shows the partial top plan view of the typical magnetic circuit of stator winding in Fig. 2.In typical two-wire machine (that is, there are two lines in parallel), expect that every root line all has radial position in the average groove substantially identical with the another single line of this double winding centering.Why because magnetic flux is towards the back iron of stator core along stator tooth transmission like this.Such as, the set 155 of the magnetic line of force of the given groove of stator core 10 comprises the magnetic flux 156 transmitted towards back iron 158 along stator tooth 157, also comprises and skips the magnetic flux 159,160 of core slots 12 to adjacent stators tooth 161.As its result, as compared to the conductor at the back (that is, radial outer part) closer to core slots 12, the conductor closer to the inner surface 162 of stator core 10 is connected by more magnetic flux.In this case, the voltage that produces in every root conductor is different, and this difference causes circulation to flow around given conductor, instead of directly by conductor to provide available electric power.Thus leakage flux reduces the efficiency of motor.
Traditionally, stator winding can be formed as alternative form, and it is in interlayer route conductors thus make the average radial of each conductor and stator center axle distance probably equal.Another traditional stator winding can route conductors thus therefore each groove comprising out-of-phase current and kelvin effect is reduced.Comparatively speaking, the cascade wire of current disclosed execution mode is not staggered, and therefore on location, does not have different radial deflections.Such as, the double winding in exemplary embodiment can have along one deck (1) First Line circumferentially with along two layers (2) the second line circumferentially.By as is also shown in fig. 4 one deck (1) winding of cascade sequentially being extended to three layers (3), four layers (4) and two layers (2), and by optionally placing the wiring part of 5-7 pitch, the wiring part of 7 pitches and reverse part, can provide so a kind of conductor part form, wherein the average radial distance of first-line conductor part and the average radial of second-line conductor part are apart from roughly equal.Due to the every root line for winding, both provide equal average radial distance, therefore produced associated voltage becomes equal and machine efficiency is improved.Such as, the deviation of the pulsation in stator current and winding both end voltage is reduced, this is because any difference of leakage flux all produces relevant voltage fluctuation between line, this voltage fluctuation is along with it becomes normalization as double winding when stator circumference distributes.
Hereafter the list according to preferred implementation of the present disclosure:
1. a stator, comprising:
The iron core of substantial cylindrical, its groove of multiple longitudinal extensions that there are two axle heads and formed between;
First winding combination, two radial layer being formed as the first groove being arranged in groove neutralize the first cascade conductor of a layer of the second groove of the groove adjacent with the first groove; And
Second winding combination, two other radial layer being formed as being arranged in the first groove neutralize the second cascade conductor of another layer of the second groove, and wherein the first and second conductor electrical connect.
2. the stator of preferred implementation 1, one wherein in the first winding combination and the second winding combination comprises reverse part.
3. the stator of preferred implementation 1 or 2, wherein these four layers comprise the wiring part of at least one 5-7 pitch.
4. the stator of preferred implementation 3, wherein these four layers comprise the wiring part of at least one 7 pitch.
5. any one stator in preceding preferred embodiment, wherein two radial layer of the first groove of the first winding combination to be positioned in radial innermost and radial direction the 3rd inner position, and wherein two radial layer of the first groove of the second winding combination be positioned at radial upper second inner with radial direction on the 4th inner position.
6. the stator of preferred implementation 5, the radial layer of wherein adjacent with the first groove of the first winding combination groove is positioned at radial outermost position, and the radial layer of wherein adjacent with the first groove of the second winding combination groove is in radial upper second outer position.
7. any one stator in preceding preferred embodiment, also comprises the 3rd groove, and it is same adjacent with the first groove, and wherein the first conductor is arranged in a layer of the 3rd groove, and wherein the second conductor is arranged in another layer of the 3rd groove.
8. any one stator in preceding preferred embodiment, wherein the first groove comprises the conductor only having a phase.
9. any one stator in preceding preferred embodiment, wherein the second groove comprises first-phase and second-phase.
10. any one stator in preceding preferred embodiment, wherein two radial layer of the first winding combination to be positioned in radial innermost and radial direction the second inner position, and wherein two radial layer of the second winding combination be positioned at radial upper 3rd inner with radial direction on the 4th inner position.
The stator of 11. preferred implementations 9, in its middle slot, same three groove adjacent with the first groove comprises third phase and first-phase.
The stator of 12. preferred implementations 11, each groove wherein in multiple groove only comprises first-phase, and each groove in multiple groove comprises the first and second phases, and each groove wherein in multiple groove comprises first and third phase.
The stator of 13. preferred implementations 12, wherein each other groove only comprises a phase.
14. 1 kinds of stators, comprising:
The iron core of substantial cylindrical, its groove of multiple longitudinal extensions that there are two axle heads and formed between;
First winding combination, is formed as having the cascade phase conductor of three conductor parts of first and second layers that are arranged in groove; And
Second winding combination, is formed as having the cascade phase conductor of three conductor parts of third and fourth layer that is arranged in groove.
The stator of 15. preferred implementations 14, also comprises three connecting portions between the conductor part of each phase conductor of the first and second winding combination.
The stator of 16. preferred implementations 14 or 15, wherein the first winding combination comprises at least one reverse part, the wiring part of at least one 5-7 pitch, and the wiring part of at least one 7 pitch.
Stator any one of 17. preferred implementations 14 to 16, wherein each is filled in full groove at one and has X conductor part, in the rear portion of adjacent the first groove of the groove full with this filling, there is X/2 conductor part, and in the front portion of adjacent the second groove of the groove full with this filling, there is X/2 conductor part.
Stator any one of 18. preferred implementations 14 to 17, wherein each phase conductor comprises at least one reverse part.
Stator any one of 19. preferred implementations 14 to 18, wherein each other groove only comprises a phase.
20. 1 kinds of stators, comprising:
The iron core of substantial cylindrical, its groove of multiple longitudinal extensions that there are two axle heads and formed between;
First winding combination of first-phase, is formed as the first cascade conductor of two radial layer of the first groove being arranged in groove; And
Second winding combination of second-phase, is formed as the second cascade conductor of two other radial layer being arranged in the first groove.
The stator of 21. preferred implementations 20, wherein winding combination comprises the wiring part of at least one 7 pitch.
The stator of 22. preferred implementations 20 or 21, wherein winding combination comprises the wiring part of at least one 5-7 pitch.
Stator any one of 23. preferred implementations 20 to 22, also comprise the tertiary winding combination of the third phase being formed as third level connection conductor, and wherein each other groove only comprises a phase.
Comprise various execution mode of the present invention although described in detail, also can further revise the present invention and adapt to those skilled in the art.But clearly understand, these amendments and adaptation are in the spirit and scope of the present invention.
Claims (23)
1. a stator, comprising:
The iron core (10) of substantial cylindrical, its groove (12) of multiple longitudinal extensions that there are two axle heads (18,20) and formed between;
First winding combination, be formed as the first cascade conductor (35) in a layer of second groove (58,59) of two radial layer neutralization of the first groove (57) being positioned at groove (12) groove (12) adjacent with the first groove (57); And
Second winding combination, two other radial layer being formed as being positioned at the first groove (57) neutralize the second groove (58,59) the second cascade conductor (36) in another layer, wherein the first and second conductors (35,36) electrical connection.
2. stator as claimed in claim 1, one wherein in the first winding combination and the second winding combination comprises reverse part (146).
3. stator as claimed in claim 1 or 2, wherein these four layers comprise the wiring part (135,140,141) of at least one 5-7 pitch.
4. stator as claimed in claim 3, wherein these four layers comprise the wiring part (149,152) of at least one 7 pitch.
5. as stator in any one of the preceding claims wherein, wherein two radial layer of first groove (57) of the first winding combination to be positioned in radial innermost and radial direction the 3rd inner position, and wherein two radial layer of first groove (57) of the second winding combination be positioned at radial upper second inner with radial direction on the 4th inner position.
6. schedule as claimed in claim 5, the radial layer of wherein adjacent with first groove (57) of the first winding combination groove (58) is positioned at radial outermost position, and the radial layer of wherein adjacent with first groove (57) of the second winding combination groove (58) is in radial upper second outer position.
7. as stator in any one of the preceding claims wherein, also comprise the 3rd groove (59), it is same adjacent with the first groove (57), wherein the first conductor (35) is arranged in a layer of the 3rd groove (59), and wherein the second conductor (36) is arranged in another layer of the 3rd groove (59).
8., as stator in any one of the preceding claims wherein, wherein the first groove (57) comprises the conductor (35,36) of an only phase (A).
9., as stator in any one of the preceding claims wherein, wherein the second groove (58) comprises first-phase (A) and second-phase (C).
10. as stator in any one of the preceding claims wherein, wherein two radial layer of the first winding combination to be positioned in radial innermost and radial direction the second inner position, and wherein two radial layer of the second winding combination be positioned at radial upper 3rd inner with radial direction on the 4th inner position.
11. stators as claimed in claim 9, in its middle slot (12), same three groove (59) adjacent with the first groove (57) comprises third phase (B) and first-phase (A).
12. stators as claimed in claim 11, each groove wherein in multiple groove (12) only comprises first-phase (A), in multiple groove, each groove of (12) comprises the first and second phase (A, C), and each groove wherein in multiple groove (12) comprises first and third phase (A, B).
13. stators as claimed in claim 12, wherein each other groove (12) only comprises a phase (A, B, C).
14. 1 kinds of stators, comprising:
The iron core (10) of substantial cylindrical, its groove (12) of multiple longitudinal extensions that there are two axle heads (18,20) and formed between;
First winding combination, is formed as having the cascade phase conductor (35) of three conductor parts of first and second layers that are arranged in groove (12); And
Second winding combination, is formed as having the cascade phase conductor (36) of three conductor parts of third and fourth layer that is arranged in groove (12).
15. stators as claimed in claim 14, three connecting portions between the conductor part also comprising each phase conductor (35,36) being positioned at the first and second winding combination.
16. stators as described in claims 14 or 15, wherein the first winding combination comprises at least one oppositely part (146), the wiring part (135 of at least one 5-7 pitch, 140,, and the wiring part of at least one 7 pitch (149,152) 141).
17. stators according to any one of claim 14 to 16, wherein each phase (A, B, C) fill in full groove (57) at one there is X conductor part, in the rear portion of adjacent the first groove (58) of the groove (57) full with this filling, there is X/2 conductor part, and in the front portion of adjacent the second groove (59) of the groove (57) full with this filling, there is X/2 conductor part.
18. stators according to any one of claim 14 to 17, wherein each phase conductor (35,36) comprises at least one oppositely part (146).
19. stators according to any one of claim 14 to 18, wherein each other groove (12) only comprises a phase (A, B, C).
20. 1 kinds of stators, comprising:
The iron core (10) of substantial cylindrical, its groove (12) of multiple longitudinal extensions that there are two axle heads and formed between;
First winding combination of first-phase (A), is formed as the first cascade conductor (35,36) of two radial layer of the first groove (59) being arranged in groove (12); And
Second winding combination of second-phase (B), is formed as the second cascade conductor (46,47) of two other radial layer of the first groove (59) being arranged in groove (12).
21. stators as claimed in claim 20, wherein winding combination comprises the wiring part (149,152) of at least one 7 pitch.
22. stators as described in claim 20 or 21, wherein winding combination comprises the wiring part (135,140,141) of at least one 5-7 pitch.
23. stators according to any one of claim 20 to 22, also comprise the tertiary winding combination of the third phase (C) being formed as third level connection conductor (48,49), and wherein each other groove (12) only comprises a phase (A, B, C).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/974,591 US10110078B2 (en) | 2013-08-23 | 2013-08-23 | Distributed cascaded winding for electric machines |
| US13/974,591 | 2013-08-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104426257A true CN104426257A (en) | 2015-03-18 |
| CN104426257B CN104426257B (en) | 2019-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410605755.4A Active CN104426257B (en) | 2013-08-23 | 2014-08-22 | Distributed cascade winding for motor |
Country Status (3)
| Country | Link |
|---|---|
| US (3) | US10110078B2 (en) |
| CN (1) | CN104426257B (en) |
| DE (1) | DE102014111803A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20150054374A1 (en) | 2015-02-26 |
| CN104426257B (en) | 2019-05-28 |
| US11038391B2 (en) | 2021-06-15 |
| US10110078B2 (en) | 2018-10-23 |
| US20190020237A1 (en) | 2019-01-17 |
| DE102014111803A1 (en) | 2015-02-26 |
| US20210305863A1 (en) | 2021-09-30 |
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